package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceimpl implements UserService {
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {

        //调用微信接口服务，获得openid
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为空
        if(openid==null)
        {
        throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断是否是新用
        User user=userMapper.getByOpenId(openid);
        // 如果是，完成注册
        if (user==null)
        {
            user= User.builder().
                    openid(openid).
                    createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;
    }

    private String getOpenid(String code)
    {
        Map<String,String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json=HttpClientUtil.doGet(WX_LOGIN,map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
